An application is identified that was running at a time of a system crash. A system dump file is received that was created responsive to the system crash. A restoration dataset stored in the system dump file is determined. The application is restored based, at least in part, on the restoration dataset.
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1. A method for restoring an application from a kernel dump file, the method comprising: identifying an application that was running at a time of a system crash; receiving a kernel dump file that was created responsive to the system crash; determining a restoration dataset stored in the kernel dump file; determining, based on the restoration dataset, if data generated by the application at the time of the system crash was paged out to swap space; responsive to determining data generated by the application at the time of the system crash was paged out to swap space, extracting swap space information; and restoring the application based, at least in part, on the restoration dataset and the swap space information, wherein the application is restored to the state it was in at the time of the system crash; wherein: at least the receiving, determining, and restoring steps are performed by computer software running on computer hardware.
The process of restoring an application after a system crash involves these steps, all performed by computer software on computer hardware: First, identify which applications were running when the crash occurred. Then, obtain the system dump file created as a result of the crash. Examine this dump file to find a "restoration dataset" containing application-specific information. Check if any data the application was using at the time of the crash had been moved to the swap space (disk). If so, extract the relevant swap space data. Finally, restore the application to its state at the time of the crash, using both the restoration dataset from the dump file and the extracted swap space information.
2. The method of claim 1 , wherein the restoration dataset includes at least one of the following: stack, heap, central processing unit state, resources assigned or used including shared memory, shared libraries, open file descriptors and sockets, and thread specific information.
Building upon the previous application restoration process, the "restoration dataset" found in the system dump file contains several crucial pieces of information. This includes data related to the application's stack, heap, CPU state, resources that were assigned to or used by the application (like shared memory, shared libraries, open file descriptors, and sockets), and thread-specific information. This detailed data allows a more complete reconstruction of the application's state at the time of the system crash.
3. The method of claim 1 , further comprising: determining a plurality of target applications to restore that were running prior to the system crash.
Expanding the original application restoration process, it is possible to identify and restore multiple applications that were running before the system crash. Instead of just restoring one application, the system can determine a group of "target applications" to restore. The subsequent steps of obtaining the system dump file, determining restoration datasets and swap space information (if needed), and the actual restoration process are then applied to each of these target applications.
4. The method of claim 1 , further comprising: selecting the target application from a list of applications that were running at the time of the system crash.
As an extension of the initial application restoration method, the process includes selecting a specific application to restore from a list of all applications that were running when the system crashed. Instead of automatically restoring all applications, a user or system can choose a "target application" from this list. The system then proceeds with obtaining the dump file, determining restoration datasets and swap space information (if necessary), and the restoration of this specifically selected application.
5. The method of claim 1 , wherein the application is restored to the state it was in at a time before the system crash.
A variation of the original application restoration process allows restoring the application to a state *before* the exact moment of the system crash, rather than precisely at the crash time. The application is restored based on the restoration dataset, swap space information (if needed), but targets a point in time slightly preceding the crash. This could be useful for scenarios where the application state immediately before the crash might be corrupted or undesirable.
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June 13, 2014
May 16, 2017
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